Improvement in lawn-mowers



UNITED STATES PATENT OFFICE..

HUBERT C. HART, OF UNIONVILLE, CONNECTICUT.

IMPROVEMENT IN .LAWN-MOWERS.

Specification forming part of Letters Patent No. 110,467, dated December 27, 1870.

To all whom it may concern:

Be it known that I, HUBERT O. HART, of Unionville, in the county of Hartford and State of Connecticut, have invented certain Improvements in Lawn-Mowers, of which the following is a specification: Y

My improvements are applied to that class of small hand-mowing machines termed lawnmowers; and consists in an arrangement for driving a set of reciprocating cutting-teeth, situated in front of the machine, by intermediate mechanism, which takes the driving-power from the main roller of the machine.

Referring to the accompanying drawing, Figure 1 is a plan View. Fig. 2 is a side elevation.

The letters a a indicate the frame, connected and held together by the cross-pieces b b. c is the handle, attached to the roller 01, which turns freely in bearings in the frame.

The letter 0 indicates the main roller, with a gear-wheel, f, at one or both ends, driving the gears g, which are fixed to the shaft h, upon which is the cylindrical cam i, in the surface of which cam is the serpentine groove j, in which groove runs a pin, fixed in the end of the lever is, which lever is pivoted to the cross-piece b at l, and at its farther extremity is pivoted, by a pin, to the reciprocating cutting-barm,which is provided in front with cuting-teeth n. V.

Directly under the reciprocating bar is a stationary bar, having teeth similar to those on the cutter-bar m.

It Will be readily understood that, by means of the mechanism just described, the cutterbar will be caused to reciprocate as the machine is pushed forward, and thus cut the grass.

The cylindrical cam i can be made of any desired size, as it projects back into the body of the main roller; and, also, the groove j can be made to have as many convolutions as desired. This arrangement of sinkin the cam iinto the body of the roller allows of placing the shaft h very close to the roller,

and, at the same time, permits of making the I ter m n, and the frame a, when the parts are constructed and arranged specifically as described, for the purpose set forth.

HU'BERT O. HART.

Witnesses MARY MosEs, THOMAS BROOKS. 

